PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

SN54121JMicrocircuit,digital

National Semiconductor Corporation · NSN 5962-00-758-7506 · FSC 5962 · No Item Name Available
Verified by PartsTable
NSN 5962-00-758-7506 — this item is cataloged by the U.S. Government under National Stock Number 5962-00-758-7506. Primary manufacturer part number: SN54121J.
Features
  • Microcircuit,digital — FSC 5962
  • Operating Temp Range: -55.0 TO 125.0 CELSIUS DEGC
  • Design Function and Quantity: 1 MULTIVIBRATOR, MONOSTABLE
  • Body Width: 0.220 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
  • Output Logic Form: TRANSISTOR-TRANSISTOR LOGIC
  • Case Outline Source and Designator: T0-116 JOINT ELECTRON DEVICE ENGINEERING COUNCIL
  • Body Length: 0.660 INCHES MINIMUM AND 0.785 INCHES MAXIMUM IN
  • Storage Temp Range: -65.0 TO 150.0 CELSIUS DEGC
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Microcircuit,digital, cataloged under National Stock Number 5962-00-758-7506, is classified within Federal Supply Class 5962 (No Item Name Available) of the Electrical and Electronic Equipment Components group. The primary manufacturer of record is National Semiconductor Corporation. Government technical data includes 13 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 13 commercial cross-references from 12 manufacturers, enabling identification through both NSN and commercial part number lookups. 8 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN5962-00-758-7506
Primary Part NumberSN54121J
Item NameMicrocircuit,digital
FSC / FSG5962 / 59 — No Item Name Available
ManufacturerNational Semiconductor Corporation
StatusCANCELLED
Operating Temp Range-55.0 TO 125.0 CELSIUS DEGC
Design Function and Quantity1 MULTIVIBRATOR, MONOSTABLE
Body Width0.220 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN
Output Logic FormTRANSISTOR-TRANSISTOR LOGIC
Case Outline Source and DesignatorT0-116 JOINT ELECTRON DEVICE ENGINEERING COUNCIL
Body Length0.660 INCHES MINIMUM AND 0.785 INCHES MAXIMUM IN
Storage Temp Range-65.0 TO 150.0 CELSIUS DEGC
Features ProvidedHERMETICALLY SEALED AND MONOLITHIC AND POSITIVE OUTPUTS AND COMPLEMENTARY OUTPUTS
Inclosure MaterialCERAMIC AND GLASS
Input Circuit Pattern3 INPUT
Inclosure ConfigurationDUAL-IN-LINE
Maximum Power Dissipation Rating90.0 MILLIWATTS
Body Height0.140 INCHES MINIMUM AND 0.180 INCHES MAXIMUM IN
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 8
5962-00-147-4497221G3110 INTERCHANGEABLE
Microcircuit,digital
Herley Chicago Dba Stewart Warner Electronics
5962-00-148-4151911467-5 INTERCHANGEABLE
Microcircuit,digital
Bae Systems Information and Electronic Systems Integration Inc.
5962-00-184-5765536911-2 INTERCHANGEABLE
Microcircuit,digital
Raytheon Company Dba Raytheon
5962-00-510-9235SN54121J INTERCHANGEABLE
Microcircuit,digital
Texas Instruments Incorporated
5962-00-875-2986513032-1 INTERCHANGEABLE
Microcircuit Assembly
Naval Air Warfare Center Aircraft Division Joint Base Jbmdl
5962-00-886-2782MC54121L INTERCHANGEABLE
Microcircuit,digital
Freescale Semiconductor, Inc.
5962-01-079-7738118652-202 INTERCHANGEABLE
Microcircuit,digital
L3harris Technologies, Inc.
5962-01-262-7135 INTERCHANGEABLE
Microcircuit,digital
Cross-Reference Index
Part NumberManufacturer
Q67000-K21-Z9 Tdk Electronics Ag (DEU)
Q67000-K21-Z9 Epcos Ag Abt. Pr Roe K Pm (DEU)
GM820JV1 Northrop Grumman Systems Corporation (USA)
17007017 Airco Republic Electronics, Inc. Div the Aeronautical Instrument & Radio Co (USA)
MC54121L Freescale Semiconductor, Inc. (USA)
BL0821664 Rohde & Schwarz Gmbh & Co. Kommanditgesellschaft Dba R & S (DEU)
SN54121J PRIMARY National Semiconductor Corporation (USA)
W5083098FS Oerlikon-Buehrle Ag Werkzeugmaschinenfabrik (CHE)
W5083098FS Rheinmetall Air Defence Ag (CHE)
1410-2453 Lockheed Martin Corp Lockheed Martin Mission Systems (USA)
SN54121J00 PRIMARY Texas Instruments Incorporated (USA)
SN54121J Texas Instruments Incorporated (USA)
54121D Itt Semiconductors Div (USA)
Related Parts
5962-00-147-4497INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
221G3110
5962-00-148-4151INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
911467-5
5962-00-184-5765INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
536911-2
5962-00-510-9235INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
SN54121J
5962-00-875-2986INTERCHANGEABLE
MICROCIRCUIT ASSEMBLY
513032-1
5962-00-886-2782INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
MC54121L
5962-01-079-7738INTERCHANGEABLE
MICROCIRCUIT,DIGITAL
118652-202
5962-01-262-7135INTERCHANGEABLE
MICROCIRCUIT,DIGITAL

Frequently Asked Questions

What is NSN 5962-00-758-7506?

NSN 5962-00-758-7506 is a Microcircuit,digital, manufactured by National Semiconductor Corporation, classified under FSC 5962 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 5962-00-758-7506?

NSN 5962-00-758-7506 has 13 cross-referenced part numbers: Q67000-K21-Z9 (Tdk Electronics Ag), Q67000-K21-Z9 (Epcos Ag Abt. Pr Roe K Pm), GM820JV1 (Northrop Grumman Systems Corporation), 17007017 (Airco Republic Electronics, Inc. Div the Aeronautical Instrument & Radio Co), MC54121L (Freescale Semiconductor, Inc.) and 8 more.

What NSN replaces 5962-00-758-7506?

There are 8 known substitutes for 5962-00-758-7506: 5962-00-147-4497, 5962-00-148-4151, 5962-00-184-5765 and 5 more. Verify interchangeability with system specifications before substitution.

What are the specifications of SN54121J?

Key specifications for SN54121J: Operating Temp Range: -55.0 TO 125.0 CELSIUS DEGC; Design Function and Quantity: 1 MULTIVIBRATOR, MONOSTABLE; Body Width: 0.220 INCHES MINIMUM AND 0.280 INCHES MAXIMUM IN; Output Logic Form: TRANSISTOR-TRANSISTOR LOGIC. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 5962-00-758-7506 still in active supply?

NSN 5962-00-758-7506 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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